Blender debugging symbol files
Anyone can do a debug build and make these files available, but typically we don't do this.

However - you assume the person fixing the bug has ms-windows, MSVC - etc, however many devs use Linux and OSX.
Even ignoring this, the crash data alone often isn't enough, developers need to be able to reproduce the bug so they can change the code and prove that the bug is fixed (without the trouble of sending you an updated build and having you test - which would get very tedious/slow).

Normally its possible to provide a blend file and some steps to redo the bug which is better for devs so they can redo on their own platform.